摘要
对两种非水相流体(NAPL)(煤油和四氯乙烯)在3种不同质地的黄土性土壤(沙土、黄绵土和土娄土)中的非饱和入渗特征进行了试验研究。结果表明:非水相污染物在土壤中的入渗与水分入渗规律相类似,累积入渗量曲线均很好地符合考斯加柯夫公式(F=atα);随着土壤质地的加重,入渗速率降低,表现为沙土>黄绵土>土娄土;两种污染物(煤油和四氯乙烯)在土壤中的入渗速率表现为相同温度下粘滞性较大的煤油入渗速率明显地小于粘滞性较小的四氯乙烯;对于同一质地土壤,随着土壤容重的增大,污染物迁移的速率降低,土壤的压实对污染物的迁移有抑制作用。
Using the method of horizontal column infiltration, unsaturated liquid infiltration characteristic of two kinds of NAPL (kerosene and PCE) in different texture soil were studied. The results showed that: there exist same infiltration characteristic of NAPL with water in soil, the curves of accumulative infiltration capacity of NAPL in different soil could be describe with equation of Koctiakov (F=at~α); NAPL infiltration rate decrease with increase of soil clay content, showed sand soil>Huang mian soil>Lou soil; There was a large infiltration rate of PCE in soil comparing with kerosene, there may be the effect of dynamics viscosity; there have restrain function of soil compress on NAPL infiltration, NAPL infiltration rate decrease with increase of soil bulk density.
出处
《干旱地区农业研究》
CSCD
北大核心
2005年第4期49-52,共4页
Agricultural Research in the Arid Areas
基金
西北农林科技大学青年基金(04zm066)资助
关键词
非水相液体
黄土
水平入渗
累积入渗量
NAPL
Loess soil
horizontal infiltration
accumulative infiltration capacity
